Re: scalar string attribute question...

• To: netcdf-hdf@xxxxxxxxxxxxxxxx
• Subject: Re: scalar string attribute question...
• From: Ed Hartnett <ed@xxxxxxxxxxxxxxxx>
• Date: Tue, 13 Sep 2005 08:19:01 -0600

Elena Pourmal <epourmal@xxxxxxxxxxxxx> writes:

> Ed,
>
> You have to use
> H5Tset_size (typeid,H5T_VARIABLE) instead of H5Tset_size(typeid, strlen(txt))
>
> Elena

When I try this I get a seg fault when I reach H5Awrite...

The question is, do I have to tell HDF5 the length of a string in a
scalar string attribute?

Thanks!

Ed

   /* See if we can write an attribute to the root group. */
   if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, 
                           H5P_DEFAULT)) < 0) ERR;
   if ((grpid = H5Gopen(fileid, "/")) < 0) ERR;

   /* Attach a text attribute with some of Hamlet's lines. */
   if ((spaceid = H5Screate(H5S_SCALAR)) < 0) ERR;
   if ((typeid = H5Tcopy(H5T_C_S1)) < 0) ERR;
   if (H5Tset_size(typeid, H5T_VARIABLE) < 0) ERR;
   if ((attid = H5Acreate(grpid, ATT1_NAME, typeid, spaceid, 
                          H5P_DEFAULT)) < 0) ERR;
   if (H5Awrite(attid, typeid, txt) < 0) ERR;

-- 
Ed Hartnett  -- ed@xxxxxxxxxxxxxxxx

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